In Prototype.js, there’s a handy function $F to get the value of a form element.
However it doesn’t work well with a group radio buttons. The argument of $F is the id of the element, and since id is unique, we can’t use the name of the radio group to get the value, which is essentially […]

For multi-dimension Hash, .merge will replace the values as a 2 dimension hash.

>> {”number” => {”1″ => “one”,”2″ => “two”}}.merge({”number” => {”3″ => “three”}})
=> {”number”=>{”3″=>”three”}}

We needed the keep the hash values and merge complex hash together that is loaded from YAML.
Solution?

class Hash
def recursive_merge(h)
[…]